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Thank you for you anwser.

However my question wasn't how I can invert the normals of a shader with Cull mode = on, but how I can invert the normals of the backfaces created by a shader with the Cull mode = off while keeping the normals of the frontfaces unchanged.

Hello,

I'm making a double-sided shader and I want to flip the normals of the backfaces in order to have a correct lighting.
I'm aware of the Switch by face and Face nodes but I can't feed them to the Local Vertex Normal ports (console info : doesn't work properly with Vertex ports).

I'm wondering ...

Hello,

Thanks a lot ! This setup works perfectly (with normalize check).

Hi !

I'm working on a grass shader. I want the normals of the mesh always facing upward whatever rotation is applied on the gameObject.

I guess I want to feed the Y world normal into the local vertex normal but it doesn't work. Any ideas on how to achieve this effect ?